CN104129998B - Calcining petroleum coke comprehensive utilization process - Google Patents
Calcining petroleum coke comprehensive utilization process Download PDFInfo
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- CN104129998B CN104129998B CN201410233553.1A CN201410233553A CN104129998B CN 104129998 B CN104129998 B CN 104129998B CN 201410233553 A CN201410233553 A CN 201410233553A CN 104129998 B CN104129998 B CN 104129998B
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Abstract
A kind of calcining petroleum coke comprehensive utilization process, comprise the following steps: petroleum coke is crushed by (1), respectively different kind, then carry out except ferrum, (2), carry out mixing by different types of petroleum coke join obtain mix petroleum coke, mixing the mixing petroleum coke ash after joining and be not more than 0.4%, volatile matter controls 10.5 11%；And addition accounts for the mischmetal of its weight 0.005 0.01%, accounts for the carborundum of its weight 0.005 0.006% in mixing petroleum coke；(3), introduce isolation air calcination in eight layers of downflow type can-type calcine furnace by mixing the mixing petroleum coke after joining, calcination process enters waste heat boiler using the volatile matter produced generate electricity as fuel, high-temperature flue gas.The present invention makes the volatile matter content of control petroleum coke by the mixing ratio of regulation inhomogeneity petroleum coke, make it just can complete the calcination process of petroleum coke only by volatile matter when calcining, and flue gas burning produced generates electricity to entrance boiler after air preheat, substantially increase the recovery utilization rate of resource, reach the final purpose of energy-saving and emission-reduction.
Description
Technical field
The invention belongs to field of solid waste comprehensive utilization, specifically a kind of calcining petroleum coke comprehensive utilization process.
Background technology
Petroleum coke is the side-product in petroleum refining process, and its form is difference with processing procedure, operating condition and the difference of feed properties.The petroleum coke produced from petroleum coke workshop is referred to as green coke, the fugitive constituent of the carbon hydrocarbon compound containing some non-carbonizations, green coke just can be as the petroleum coke of fuel-grade, if the anode of aluminium metallurgy to be done or the electrode of steel-making, then need again through high-temperature calcination, make it complete carbonization, reduce fugitive constituent to minimum degree.Calcining petroleum coke is carried out by calcining furnace or rotary kiln at present, but all there is heating by the exhaust gases and utilize insufficient and product quality unstable, such as insufficient strength, the defects such as sulfur content is high.
Summary of the invention
For drawbacks described above, the present invention provides a kind of reasonable in design, heating by the exhaust gases utilization rate height, the calcining petroleum coke comprehensive utilization process of constant product quality, and it can be greatly improved the level of comprehensive utilization of petroleum coke.
The technical solution used in the present invention comprises the following steps:
(1) carry out being crushed to particle diameter, respectively by different types of petroleum coke to 5-30mm, then carry out except ferrum,
(2), by different types of petroleum coke carrying out mixing joining and obtain mixing petroleum coke, mix the mixing petroleum coke ash after joining and be not more than 0.4%, volatile matter controls at 10.5-11%；And addition accounts for the mischmetal of its weight 0.005-0.01%, accounts for the carborundum of its weight 0.005-0.006% in mixing petroleum coke；Described mischmetal is made up of yttrium, berkelium and lanthanum, and the mass ratio of three is 1:(0.1-0.15): (0.25-0.30)；α-SiC particulate that described carborundum selects granularity to be 5-10 μm；
(3), it is interrupted mixing the mixing petroleum coke after joining by the charging mechanism at top or is continually introduced in eight layers of downflow type can-type calcine furnace, described downflow type can-type calcine furnace includes outside body of heater and the multiple calcining tanks of internal vertical configuration being built into by refractory brick, the bottom of body of heater is provided with regenerator, is provided with flue and air preheat pipeline in regenerator；8 layers of quirk of about one roundabout layout it are equipped with on the body of heater of the both sides of each calcining tank, the top of each calcining tank is equipped with volatile matter discharger, and each volatile matter discharger is all connected with volatile matter set road, described volatile matter set road distributes the road layers 1 and 2 respectively with each bar quirk by volatile matter and connects, 8th layer of quirk is connected with described flue, and flue is provided with induced-draft fan；The bottom of described calcining tank connects cooling jacket；
Then in layers 1 and 2 quirk, natural gas is introduced by gas-pipe line, and carry out mixed combustion with the air coming from air preheat pipeline, flue is advanced into by 1 layer of quirk to 8 layers of quirk is roundabout by the draft pilot flame of induced-draft fan and high temperature gas flow, volatile matter in calcining tank is introduced in layers 1 and 2 quirk simultaneously, when the temperature of layers 1 and 2 quirk reach 950-1000 spend time, close gas-pipe line, carry out combustion heating only by volatile matter as fuel, make petroleum coke completely cut off air high-temperature calcination in calcining tank；Control the calcining heat in 1-2 layer quirk in 1300-1350 degree, chimney meatus transmitting smoke temperature at 700-800 degree；When petroleum coke the time of calcining in tank of calcining reach 72 little time after, petroleum coke falls into cooling jacket cooling and then periodically or continuously obtains finished product through discharge mechanism.In order to keep the stability of calcining petroleum coke, the present invention extends the calcination time of petroleum coke to 72 hours (prior art is mostly 18-36 hour).
Entering the high-temperature flue gas of flue in thermophore and after the air of air preheat pipeline carries out heat exchange, flue gas enters waste heat boiler and generates electricity.
Optimizing the technical program further, the granularity after described petroleum coke is broken is 5-10mm, and granularity is unfavorable for the most greatly uniform calcination, is also unfavorable for having an effect with carborundum and rare earth；Undersized, easily causes powder and too much blocks the defects such as volatile matter passage, and facts have proved that suitable granularity can improve the quality index of after-smithing petroleum coke, i.e. resistivity is lower, and true density is higher.
Optimize the technical program further, described refractory brick is prepared by following steps: by the portland cement of 30-35 weight portion, the flyash of 18-21 weight portion, the carborundum of 14-16 weight portion, the aluminium oxide of 20-25 weight portion, 5-10 weight portion magnesium oxide, 5-6 parts by weight of silica, the vermiculite power of 3-5 weight portion, the zirconium oxide of 2-4 weight portion, 1-2 parts by weight of graphite, the mixing of 0.5-1 parts by weight of titanium dioxide is mixed-powder, it is subsequently adding the bonding agent of the 5-6% accounting for mixed-powder gross weight, after hydraulic press molding, through being dried, it is sintered to get product, the temperature of sintering controls at 1420-1450 DEG C, time is 2-3 hour.It is demonstrated experimentally that the refractory brick heat stability that this kind of method obtains is high, heat insulation effect is high, high temperature resistant and mechanical strength is high, service life is longer than the silica brick used by routine 2-3 times；Such as this refractory brick refractoriness reaches 1750-1800 DEG C, higher than 1690-1710 DEG C of conventional silica brick, and is heated to 1450 DEG C from room temperature, and the overall expansion amount of this refractory brick is less than 0.6%, and the silica brick overall expansion amount of routine can reach 1.5-2.2%.
Optimize the technical program further, multiple electromagnetism generation cavity it is provided with in body of heater between described layers 1 and 2 quirk, multiple solenoids are installed in electromagnetism generation cavity, solenoid is connected with three phase mains, the yoke that the outside of solenoid is made equipped with permeability magnetic material, the power frequency of described three phase mains is 50Hz, and current intensity is 110-120A；Described electromagnetism generation cavity is externally provided with cooling chamber (when electromagnetism generation cavity temperature is too high, can appropriateness cool).
Optimizing the technical program further, described cooling chamber is connected with preheated air pipeline, is i.e. lowered the temperature to electromagnetism generation cavity by air, and the air entrance quirk after preheating is combustion-supporting simultaneously.One of thermophore and cooling chamber can be selected to air preheat, it is also possible to entered thermophore and cooling chamber preheating successively.
The present invention makes the volatile matter content of control petroleum coke by the mixing ratio of regulation inhomogeneity petroleum coke, coordinate the technological process of the calcining petroleum coke of optimization simultaneously, petroleum coke is made to need not any external fuel when calcining, the calcination process of petroleum coke just can be completed only by its volatile matter, and fume afterheat burning produced generates electricity to entrance boiler after air preheat, substantially increase the recovery utilization rate of resource, compared with prior art energy utilization rate improves more than 30%, has reached the final purpose of energy-saving and emission-reduction.Simultaneously by adding enhancing particulate carbon SiClx, due to its stable chemical performance, heat conductivity is high, anti-wear performance is good, facts have proved that it adds petroleum coke to as enhancing particle and can improve the mechanical performances such as petroleum coke anti-wear performance, and substantially increase the true density of after-smithing petroleum coke, can reach 2.15g/cm3；Add rare earth element simultaneously and play deoxidization desulfuration effect, improve the processing characteristics of petroleum coke, improve the performances such as intensity, toughness, corrosion-resistant and non-oxidizability；By electromagnetism generating effect, the resistivity of after-smithing petroleum coke can be reduced, the minimum impact that can reach 400 μ Ω m(galvanomagnetic-effects is implicitly present in, but concrete mechanism is also not very clear, it is probably electromagnetic action the crystal structure within material is reset, again or galvanomagnetic-effect constitutes impact and rearrangement to the distribution of the metallic element in petroleum coke, this need to verify further).
Accompanying drawing explanation
Fig. 1 is the structural representation of eight layers of downflow type can-type calcine furnace；
Fig. 2 is the structural representation of regenerator；
Fig. 3 is the scheme of installation of electromagnetism generation cavity；
In figure, 1, body of heater, 2, calcining tank, 3, quirk；3.1, ground floor quirk, 3.2, second layer quirk, 4, observation port, 5, flue, 6, regenerator, 7, air preheat pipeline, 8, cooling jacket, 9, baffling dividing plate, 10, electromagnetism generation cavity, 11, solenoid, 12, yoke, 13, cooling chamber.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment 1
A kind of calcining petroleum coke comprehensive utilization process, the steps include:
(1) carry out being crushed to particle diameter, respectively by different types of petroleum coke to 5-30mm, then carry out except ferrum,
(2), by different types of petroleum coke carrying out mixing joining and obtain mixing petroleum coke, mix the mixing petroleum coke ash after joining and be not more than 0.4%, volatile matter controls at 10.5-11%；And addition accounts for the mischmetal of its weight 0.005-0.01%, accounts for the carborundum of its weight 0.005-0.006% in mixing petroleum coke；Described mischmetal is made up of yttrium, berkelium and lanthanum, and the mass ratio of three is 1:(0.1-0.15): (0.25-0.30)；α-SiC particulate that described carborundum selects granularity to be 5-10 μm；
(3), it is interrupted mixing the mixing petroleum coke after joining by the charging mechanism at top or is continually introduced in eight layers of downflow type can-type calcine furnace, downflow type can-type calcine furnace includes outside body of heater 1 and the calcining tank 2 of internal vertical configuration being built into by refractory brick (silica brick), the bottom of body of heater 1 is provided with regenerator 6, is provided with flue 5 and air preheat pipeline 7(is divided into roundabout air flow by the baffling dividing plate in regenerator 6 in regenerator 6)；8 layers of quirk 3 of about one roundabout layout it are equipped with on the body of heater of the both sides of each calcining tank 2, the top of each calcining tank 2 is equipped with volatile matter discharger, and each volatile matter discharger is all connected with volatile matter set road, volatile matter set road is connected with the 1st layer of quirk 3.1 and the 2nd layer of quirk 3.2 of each article of quirk respectively by volatile matter distribution road, 8th layer of quirk is connected with flue 5, and flue 5 is provided with induced-draft fan；The bottom of calcining tank 2 connects cooling jacket 8；
Then in layers 1 and 2 quirk, natural gas is introduced by gas-pipe line, and carry out mixed combustion with the air coming from air preheat pipeline, flue is advanced into by 1 layer of quirk to 8 layers of quirk is roundabout by the draft pilot flame of induced-draft fan and high temperature gas flow, volatile matter in calcining tank is introduced in layers 1 and 2 quirk simultaneously, when the temperature of layers 1 and 2 quirk reaches 950-1000 DEG C, close gas-pipe line, carry out combustion heating only by volatile matter as fuel, make petroleum coke completely cut off air high-temperature calcination in calcining tank；Control calcining heat in 1-2 layer quirk 1300-1350 DEG C, chimney meatus transmitting smoke temperature is at 600-800 DEG C；When petroleum coke the time of calcining in tank of calcining reach 72 little time after, petroleum coke falls into cooling jacket cooling and then periodically or continuously obtains finished product through discharge mechanism.
Entering the high-temperature flue gas of flue in thermophore and after the air of air preheat pipeline carries out heat exchange, flue gas enters waste heat boiler and generates electricity.
Embodiment 2
Other steps keep constant, and the difference with embodiment 1 is, step 1 petroleum coke is crushed to particle diameter 5-10mm.
Embodiment 3
Other steps keep constant, difference with embodiment 1 is, refractory brick is prepared by following steps: by the portland cement of 30-35 weight portion, the flyash of 18-21 weight portion, the carborundum of 14-16 weight portion, the aluminium oxide of 20-25 weight portion, 5-10 weight portion magnesium oxide, 5-6 parts by weight of silica, the vermiculite power of 3-5 weight portion, the zirconium oxide of 2-4 weight portion, 1-2 parts by weight of graphite, the mixing of 0.5-1 parts by weight of titanium dioxide is mixed-powder, it is subsequently adding the bonding agent of the 5-6% accounting for mixed-powder gross weight, after hydraulic press molding, through being dried, it is sintered to get product, the temperature of sintering controls at 1420-1450 DEG C, time is 2-3 hour.This refractory brick refractoriness reaches 1750-1800 DEG C after testing, higher than 1690-1710 DEG C of conventional silica brick, and is heated to 1450 DEG C from room temperature, and the overall expansion amount of this refractory brick is less than 0.6%, and the silica brick overall expansion amount of routine can reach 1.5-2.2%.Under same calcination time, and service life is longer 2-3 times than the silica brick used by embodiment 1.
Embodiment 4
Other steps keep constant, difference with embodiment 2 is, it is provided with multiple electromagnetism generation cavity 10 in body of heater between 1st layer of quirk 3.1 and the 2nd layer of quirk 3.2, multiple solenoids 11 are installed in electromagnetism generation cavity 10, solenoid 11 is connected with three phase mains, the yoke 12 that the outside of solenoid 11 is made equipped with permeability magnetic material, the power frequency of three phase mains is 50Hz, and current intensity is 110-120A.Electromagnetism generation cavity 10 is externally provided with cooling chamber 13, and cooling chamber 13 is connected with the preheated air pipeline after thermophore 6 once heats up, thus carries out secondary preheating.
By detection, the true density of the after-smithing petroleum coke that embodiment 1-4 produces is respectively 2.09 g/cm3, 2.13 g/cm3, 2.10 g/cm3, 2.15 g/cm3, resistivity is respectively 460 μ Ω m, 440 μ Ω m, 450 μ Ω m, 420 μ Ω m, sulfur content is reduced to 0.75% by 2.1% before calcining respectively, and 0.60%, 0.72%, 0.65%, desulfurization degree is higher, and above index is all significantly less than the calcining petroleum coke quality control index that China is general, such as resistivity≤550 μ Ω m, true density >=2.07 g/cm3, sulfur content≤1.8%；The technical specification of Integrated comparative and embodiment 4 is optimal, it is possible to as the optimal material producing ultra high power graphite electrode.
The above is the preferred embodiment of the present invention; it should be noted that; for those skilled in the art; under the premise without departing from the principles of the invention; likely local processing step and parameter being made some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (2)
1. a calcining petroleum coke downflow type can-type calcine furnace, it is characterized in that, described downflow type can-type calcine furnace includes outside body of heater and the multiple calcining tanks of internal vertical configuration being built into by refractory brick, and the bottom of body of heater is provided with regenerator, is provided with flue and air preheat pipeline in regenerator；8 layers of quirk of about one roundabout layout it are equipped with on the body of heater of the both sides of each calcining tank, the top of each calcining tank is equipped with volatile matter discharger, and each volatile matter discharger is all connected with volatile matter set road, described volatile matter set road distributes the road layers 1 and 2 respectively with each bar quirk by volatile matter and connects, 8th layer of quirk is connected with described flue, and flue is provided with induced-draft fan；The bottom of described calcining tank connects cooling jacket；Multiple electromagnetism generation cavity it is provided with in body of heater between described layers 1 and 2 quirk, multiple solenoids are installed in electromagnetism generation cavity, solenoid is connected with three phase mains, the yoke that the outside of solenoid is made equipped with permeability magnetic material, the power frequency of described three phase mains is 50Hz, and current intensity is 110-120A；Described electromagnetism generation cavity is externally provided with cooling chamber；Described refractory brick is prepared by following steps: by the portland cement of 30-35 weight portion, the flyash of 18-21 weight portion, the carborundum of 14-16 weight portion, the aluminium oxide of 20-25 weight portion, 5-10 weight portion magnesium oxide, 5-6 parts by weight of silica, the vermiculite power of 3-5 weight portion, the zirconium oxide of 2-4 weight portion, 1-2 parts by weight of graphite, the mixing of 0.5-1 parts by weight of titanium dioxide is mixed-powder, it is subsequently adding the bonding agent of the 5-6% accounting for mixed-powder gross weight, after hydraulic press molding, through being dried, it is sintered to get product, the temperature of sintering controls at 1420-1450 DEG C, time is 2-3 hour.
Calcining petroleum coke downflow type can-type calcine furnace the most according to claim 1, it is characterised in that described cooling chamber is connected with air preheat pipeline.
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| CN109019551B (en) * | 2018-06-28 | 2023-07-14 | 百色皓海碳素有限公司 | Calcined coke product production process |
| CN109485028B (en) * | 2019-01-04 | 2024-01-16 | 镇江东亚碳素焦化有限公司 | Needle-shaped calcined petroleum coke production process and calciner for production thereof |
| CN111115334B (en) * | 2019-12-31 | 2020-09-08 | 河南四达电力设备股份有限公司 | Take graphite line automatic production line of automatic function of rectifying |
| CN115028161B (en) * | 2022-06-17 | 2024-01-09 | 焦作集越纳米材料技术有限公司 | Preparation method of carbon nano tube |
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| CN2127388Y (en) * | 1992-05-25 | 1993-02-24 | 冶金工业部鞍山焦化耐火材料设计研究院 | Pot-like forging furnace with 3-layered burning nozzles for needle form coking coal |
| DE69321041D1 (en) * | 1992-06-23 | 1998-10-22 | Tdk Corp | Calcination furnace |
| JP2000327378A (en) * | 1999-05-19 | 2000-11-28 | Ishikawajima Harima Heavy Ind Co Ltd | Calcining furnace for retardant fuel |
| CN201313819Y (en) * | 2008-12-03 | 2009-09-23 | 沈阳铝镁设计研究院 | Volatile matter and preheated air channel structure of calciner |
| CN101724746A (en) * | 2009-12-22 | 2010-06-09 | 上海得旺力实业有限公司 | Internal-combustion ferro-coke pellets/lump ores and method for manufacturing same |
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